<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Pdf
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Cmyk.php 18993 2009-11-15 17:09:16Z alexander $
 */

/** Internally used classes */
require_once 'Zend/Pdf/Element/Numeric.php';


/** Zend_Pdf_Color */
require_once 'Zend/Pdf/Color.php';

/**
 * CMYK color implementation
 *
 * @category   Zend
 * @package    Zend_Pdf
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Pdf_Color_Cmyk extends Zend_Pdf_Color
{
	/**
	 * Cyan level.
	 * 0.0 (zero concentration) - 1.0 (maximum concentration)
	 *
	 * @var Zend_Pdf_Element_Numeric
	 */
	private $_c;

	/**
	 * Magenta level.
	 * 0.0 (zero concentration) - 1.0 (maximum concentration)
	 *
	 * @var Zend_Pdf_Element_Numeric
	 */
	private $_m;

	/**
	 * Yellow level.
	 * 0.0 (zero concentration) - 1.0 (maximum concentration)
	 *
	 * @var Zend_Pdf_Element_Numeric
	 */
	private $_y;

	/**
	 * Key (BlacK) level.
	 * 0.0 (zero concentration) - 1.0 (maximum concentration)
	 *
	 * @var Zend_Pdf_Element_Numeric
	 */
	private $_k;


	/**
	 * Object constructor
	 *
	 * @param float $c
	 * @param float $m
	 * @param float $y
	 * @param float $k
	 */
	public function __construct($c, $m, $y, $k)
	{
		if ($c < 0) { $c = 0; }
		if ($c > 1) { $c = 1; }

		if ($m < 0) { $m = 0; }
		if ($m > 1) { $m = 1; }

		if ($y < 0) { $y = 0; }
		if ($y > 1) { $y = 1; }

		if ($k < 0) { $k = 0; }
		if ($k > 1) { $k = 1; }

		$this->_c = new Zend_Pdf_Element_Numeric($c);
		$this->_m = new Zend_Pdf_Element_Numeric($m);
		$this->_y = new Zend_Pdf_Element_Numeric($y);
		$this->_k = new Zend_Pdf_Element_Numeric($k);
	}

	/**
	 * Instructions, which can be directly inserted into content stream
	 * to switch color.
	 * Color set instructions differ for stroking and nonstroking operations.
	 *
	 * @param boolean $stroking
	 * @return string
	 */
	public function instructions($stroking)
	{
		return $this->_c->toString() . ' '
		. $this->_m->toString() . ' '
		. $this->_y->toString() . ' '
		. $this->_k->toString() .     ($stroking? " K\n" : " k\n");
	}

	/**
	 * Get color components (color space dependent)
	 *
	 * @return array
	 */
	public function getComponents()
	{
		return array($this->_c->value, $this->_m->value, $this->_y->value, $this->_k->value);
	}
}

